Remove update-jemalloc.sh, it's not needed anymore (#9690)
Remove update-jemalloc.sh, it's not needed anymore (#9690)

We now use git subtree for deps/jemalloc, updating
jemalloc is detailed in deps/README.md
PKRoma/redis,charsyam/redis,antirez/redis,charsyam/redis,ofirluzon/redis,neomantra/redis,PKRoma/redis,soloestoy/redis,yossigo/redis,oranagra/redis,charsyam/redis,PKRoma/redis,charsyam/redis,neomantra/redis,antirez/redis,oranagra/redis,neomantra/redis,soloestoy/redis,oranagra/redis,oranagra/redis,PKRoma/redis,antirez/redis,ofirluzon/redis,ofirluzon/redis,ofirluzon/redis,soloestoy/redis,yossigo/redis,yossigo/redis,yossigo/redis,yossigo/redis,ofirluzon/redis,PKRoma/redis,soloestoy/redis,charsyam/redis,neomantra/redis,neomantra/redis,soloestoy/redis,antirez/redis,oranagra/redis